PTO Operation.............. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

toomanytoyz · 01-27-2008, 08:47 AM

Any one know about PTO Operation, Is it all just Mechanical thru the Tranny?
I Dropped a Motor into the Wrecker that i bought off Jamie72 & so far can't get the PTO to engage, Do u Just have the Tranny in Neutral & Pull the Cable to engage the Pto????????????

I get nothing out of it, Any Clue what to Check out???

Thanks, Rick

Shyguy · 01-27-2008, 08:58 AM

It is mechanical as far as I can tell.

To engage the one on my 77 GMC dump truck's pto I push in the clutch and then pull the knob out to engage the pto and then I let off the clutch.

I am sure that the cable that engages the pto is adjustable.

Hopefully someone else will be able to add more information.

Danny - Southeast Missouri

89 crew · 01-27-2008, 09:56 AM

When you try to engage it does it grind or make any other noises? what does the pto hook to? is it a shaft or a pump? Is the cable moving far enough to engage it? you can have several possible problems. it can have striped out splines or key way on the driven shaft. if it is a new install it could be the wrong gear on the pto. If that is the case then the teeth are probably far enough off it can't be engaged. Or if you are lucky the cable is just adjusted wrong and it can't throw the pto far enough to make it work.

LawMan02 · 01-27-2008, 10:21 AM

On my PTO winch you have to put the transmission in neutral and the transfer case in neutral. Keeping the clutch depressed engage the pto then put the transmission in gear leaving the transfer case in neutral. It works just the winch. Depending on what gear the transmission is in as to how fast the winch will turn...along with speeding the motor increasing rpm. Hope some of this helps. I have stickers on my dash telling about the pto operations and I will photograph it for you if you need. Randy

toomanytoyz · 01-27-2008, 10:46 AM

Thanks to all for the Replies, No Grind, or any kind of action at all. The Pto has a Driveshaft that runs back to a Gear that is then Connected to a Larger Gear via a Chain, I can Turn the Driveshaft by a Wrench that in Turn drives the Gears connected to the Chain. Just Got the Motor in Truck Running Late Today & did'nt have a Lot of Time to Fool with it Today, Just wanted some Clue what Direction to Look at when i Get Back at It Tomorrow..............

Randy, The Pics would be Nice if not a Problem ...................

Thanks Again, Rick

toomanytoyz · 01-27-2008, 10:52 AM

Here are Pics of My set up.................

Rick

LawMan02 · 01-27-2008, 10:54 AM

Here's the pic. Hope it helps. Randy

89 crew · 01-27-2008, 10:57 AM

I'm going to guess at this time that your cable is either broken, or mis adjusted. If you want to test the pto you can hand shift it with the engine turned off.

LawMan02 · 01-27-2008, 10:59 AM

transmission and pto pics

toomanytoyz · 01-27-2008, 11:08 AM

Quote:

Originally Posted by 89 crew

I'm going to guess at this time that your cable is either broken, or mis adjusted. If you want to test the pto you can hand shift it with the engine turned off.

It is not Broken, But I think your right about the Adjustment........

Randy, That is a Monster PTO you Have there...........

I just wanted to Make sure that the Wrecker is Operational before i Put it on a One Ton 4x4 Frame that i Bought for it.

Here is a Link to the Thread about the Wrecker..............

Wrecker Post

Thanks, Guys

Rick

89 crew · 01-27-2008, 11:20 AM

I wouldn't swear it isn't broken unless you have removed it from the shield and verified it. I have seen those things overlap inside the shield and half way work. Check the adjustment , if it just can't seem to be made right, that is when you will know it was a bad core. For pto's I love manual linkage! Cables are easy to install, and hold up pretty good. Manual linkage is harder to install, but once it is done it will be there forever!

68K20 x Drill · 01-27-2008, 06:24 PM

I used the one on our '59n dump both in neutral, and in gear to raise the bed while driving ahead. It worked fine in 1st and 2nd, I wasn't tough enough to go higher.

72gord · 01-27-2008, 09:52 PM

Lawman your pto is mounted on the transfer case, hence trans in gear and tc in neutral for operation. Rick, check the adjustment of the cable...sometimes the one on my 1ton dump won't engage unless you let the clutch out a little to turn the trans gears to let the pto gear mesh into place. Could always lay under the truck with the motor off and grab the pto shaft and turn it by hand while trying to engage the pto with the other hand to see if it will go in, just a thought good luck with it, most of them are pretty tough unless run out of lube!!

01-27-2008, 08:47 AM	#1
toomanytoyz Luv the Crewcabs Join Date: Aug 2006 Location: Andrews, In. 46702 Posts: 4,097	PTO Operation.............. Any one know about PTO Operation, Is it all just Mechanical thru the Tranny? I Dropped a Motor into the Wrecker that i bought off Jamie72 & so far can't get the PTO to engage, Do u Just have the Tranny in Neutral & Pull the Cable to engage the Pto???????????? I get nothing out of it, Any Clue what to Check out??? Thanks, Rick Attached Images __________________ 55 Nomad 52 Willys Truck 67 Stepper 67 Fleet 68 Wrecker 68 Suburban 76 Crewcab 79 Gmc Dumptruck 84 Blazer 86 Crewcab Stepside 87 Iroc 89 GMC Plow Truck 91 Camaro Vert 96 Z71 Stepsde

01-27-2008, 08:58 AM	#2
Shyguy Junior Member Join Date: Dec 2006 Location: Southeast Missouri Posts: 2,436	Re: PTO Operation.............. It is mechanical as far as I can tell. To engage the one on my 77 GMC dump truck's pto I push in the clutch and then pull the knob out to engage the pto and then I let off the clutch. I am sure that the cable that engages the pto is adjustable. Hopefully someone else will be able to add more information. Danny - Southeast Missouri

01-27-2008, 09:56 AM	#3
89 crew Registered User Join Date: Mar 2006 Location: Kansas Posts: 865	Re: PTO Operation.............. When you try to engage it does it grind or make any other noises? what does the pto hook to? is it a shaft or a pump? Is the cable moving far enough to engage it? you can have several possible problems. it can have striped out splines or key way on the driven shaft. if it is a new install it could be the wrong gear on the pto. If that is the case then the teeth are probably far enough off it can't be engaged. Or if you are lucky the cable is just adjusted wrong and it can't throw the pto far enough to make it work.

01-27-2008, 10:21 AM	#4
LawMan02 Junior Member Join Date: Nov 2005 Location: Saint Francisville, Louisiana Posts: 157	Re: PTO Operation.............. On my PTO winch you have to put the transmission in neutral and the transfer case in neutral. Keeping the clutch depressed engage the pto then put the transmission in gear leaving the transfer case in neutral. It works just the winch. Depending on what gear the transmission is in as to how fast the winch will turn...along with speeding the motor increasing rpm. Hope some of this helps. I have stickers on my dash telling about the pto operations and I will photograph it for you if you need. Randy __________________ 1972 GMC K2500, stepside, stock 350, 4 speed. Former F/D truck with 32,000 miles, no rust. 1973 Jeep CJ 5, 304, 33's with side pipes 2008 GMC 2500HD, CC, SWB, D/A, SLT

01-27-2008, 10:46 AM	#5
toomanytoyz Luv the Crewcabs Join Date: Aug 2006 Location: Andrews, In. 46702 Posts: 4,097	Re: PTO Operation.............. Thanks to all for the Replies, No Grind, or any kind of action at all. The Pto has a Driveshaft that runs back to a Gear that is then Connected to a Larger Gear via a Chain, I can Turn the Driveshaft by a Wrench that in Turn drives the Gears connected to the Chain. Just Got the Motor in Truck Running Late Today & did'nt have a Lot of Time to Fool with it Today, Just wanted some Clue what Direction to Look at when i Get Back at It Tomorrow.............. Randy, The Pics would be Nice if not a Problem ................... Thanks Again, Rick __________________ 55 Nomad 52 Willys Truck 67 Stepper 67 Fleet 68 Wrecker 68 Suburban 76 Crewcab 79 Gmc Dumptruck 84 Blazer 86 Crewcab Stepside 87 Iroc 89 GMC Plow Truck 91 Camaro Vert 96 Z71 Stepsde

01-27-2008, 10:52 AM	#6
toomanytoyz Luv the Crewcabs Join Date: Aug 2006 Location: Andrews, In. 46702 Posts: 4,097	Re: PTO Operation.............. Here are Pics of My set up................. Rick Attached Images __________________ 55 Nomad 52 Willys Truck 67 Stepper 67 Fleet 68 Wrecker 68 Suburban 76 Crewcab 79 Gmc Dumptruck 84 Blazer 86 Crewcab Stepside 87 Iroc 89 GMC Plow Truck 91 Camaro Vert 96 Z71 Stepsde

01-27-2008, 10:54 AM	#7
LawMan02 Junior Member Join Date: Nov 2005 Location: Saint Francisville, Louisiana Posts: 157	Re: PTO Operation.............. Here's the pic. Hope it helps. Randy Attached Images __________________ 1972 GMC K2500, stepside, stock 350, 4 speed. Former F/D truck with 32,000 miles, no rust. 1973 Jeep CJ 5, 304, 33's with side pipes 2008 GMC 2500HD, CC, SWB, D/A, SLT

01-27-2008, 10:57 AM	#8
89 crew Registered User Join Date: Mar 2006 Location: Kansas Posts: 865	Re: PTO Operation.............. I'm going to guess at this time that your cable is either broken, or mis adjusted. If you want to test the pto you can hand shift it with the engine turned off.

01-27-2008, 10:59 AM	#9
LawMan02 Junior Member Join Date: Nov 2005 Location: Saint Francisville, Louisiana Posts: 157	Re: PTO Operation.............. transmission and pto pics Attached Images __________________ 1972 GMC K2500, stepside, stock 350, 4 speed. Former F/D truck with 32,000 miles, no rust. 1973 Jeep CJ 5, 304, 33's with side pipes 2008 GMC 2500HD, CC, SWB, D/A, SLT

01-27-2008, 11:20 AM	#11
89 crew Registered User Join Date: Mar 2006 Location: Kansas Posts: 865	Re: PTO Operation.............. I wouldn't swear it isn't broken unless you have removed it from the shield and verified it. I have seen those things overlap inside the shield and half way work. Check the adjustment , if it just can't seem to be made right, that is when you will know it was a bad core. For pto's I love manual linkage! Cables are easy to install, and hold up pretty good. Manual linkage is harder to install, but once it is done it will be there forever!

01-27-2008, 06:24 PM	#12
68K20 x Drill Registered User Join Date: Apr 2007 Location: Freedom CA Posts: 488	Re: PTO Operation.............. I used the one on our '59n dump both in neutral, and in gear to raise the bed while driving ahead. It worked fine in 1st and 2nd, I wasn't tough enough to go higher. __________________ 68 Chevrolet k20 Longbed 350 SM465/205, Dana 44, 14bolt, Power steering, Power Disk Brakes, 35" BFGs. 84 Chevrolet Suburban K20 6.2 Banks turbo TH400/NP208 Now with G80 68 GMC C20 Parts? Truck And a few cars

01-27-2008, 09:52 PM	#13
72gord Never enough time!! Join Date: Mar 2004 Location: sw Wisconsin Posts: 602	Re: PTO Operation.............. Lawman your pto is mounted on the transfer case, hence trans in gear and tc in neutral for operation. Rick, check the adjustment of the cable...sometimes the one on my 1ton dump won't engage unless you let the clutch out a little to turn the trans gears to let the pto gear mesh into place. Could always lay under the truck with the motor off and grab the pto shaft and turn it by hand while trying to engage the pto with the other hand to see if it will go in, just a thought good luck with it, most of them are pretty tough unless run out of lube!! Last edited by 72gord; 01-27-2008 at 09:53 PM. Reason: spelling



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